diff --git a/NEWS.md b/NEWS.md
index e75877c7a9..2157860187 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -157,6 +157,7 @@ Note: We're only listing outstanding class updates.
     * ostruct 0.5.5
     * reline 0.3.1
     * securerandom 0.2.0
+    * stringio 3.0.2.pre1
 *   The following bundled gems are updated.
     * net-imap 0.2.3
     * rbs 2.3.2